#VU41892 Permissions, Privileges, and Access Controls in Moodle - CVE-2014-0122

Vulnerability identifier: #VU41892

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2014-0122

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

The vulnerability allows a remote #AU# to read and manipulate data.

mod/chat/chat_ajax.php in Moodle through 2.3.11, 2.4.x before 2.4.9, 2.5.x before 2.5.5, and 2.6.x before 2.6.2 does not properly check for the mod/chat:chat capability during chat sessions, which allows remote authenticated users to bypass intended access restrictions in opportunistic circumstances by remaining in a chat session after an intra-session capability removal by an administrator.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Moodle: 2.0 - 2.0.9, 2.1 - 2.1.10, 2.2 - 2.2.11, 2.3 - 2.3.10, 2.4 - 2.4.8, 2.5 - 2.5.4, 2.6 - 2.6.1

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External links
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-44082
https://openwall.com/lists/oss-security/2014/03/17/1
https://moodle.org/mod/forum/discuss.php?d=256418

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.